Iban Blast was a spell that required 50 Magic to cast and was notable for its devastating damage and high accuracy. Without boosts it could deal a maximum of 250 damage. When used with appropriate magic damage boosts it could hit up to 417. This made it the most damaging of all low level and mid-level spells - almost as powerful as Fire Surge.

Players must have had completed the Underground Pass quest and had an Iban staff equipped (which requires 50 Attack) to use this spell. The spell could be cast 120 times before the staff needed to be recharged, although using it on another player would consume two charges per cast. It could be autocast, ever since the 2 September 2009 update.

The staff had to be recharged in the Well of Iban. The well is located in the Underground Pass. Using a teleport crystal to the elven village of Lletya is one of the fastest ways to get to the well. The well can be found behind the doors in the northeast of the large cavern.